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      1 /*	$NetBSD: pmap3x.h,v 1.32 2024/12/20 23:50:00 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jeremy Cooper.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifdef _KERNEL
     33 /*
     34  * Physical map structures exported to the VM code.
     35  */
     36 
     37 struct pmap {
     38 	struct a_tmgr_struct	*pm_a_tmgr; 	/* Level-A table manager */
     39 	paddr_t              	pm_a_phys;  	/* MMU level-A phys addr */
     40 	u_int             	pm_refcount;	/* reference count */
     41 	int             	pm_version;
     42 };
     43 
     44 /* Common function for pmap_resident_count(), pmap_wired_count() */
     45 segsz_t pmap_count(pmap_t, int);
     46 
     47 /* This needs to be a macro for kern_sysctl.c */
     48 #define	pmap_resident_count(pmap)	(pmap_count((pmap), 0))
     49 
     50 /* This needs to be a macro for vm_mmap.c */
     51 #define	pmap_wired_count(pmap)  	(pmap_count((pmap), 1))
     52 
     53 /* We use the PA plus some low bits for device mmap. */
     54 #define pmap_phys_address(addr) 	(addr)
     55 
     56 /* Map a given physical region to a virtual region */
     57 vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int);
     58 
     59 static __inline bool
     60 pmap_remove_all(struct pmap *pmap)
     61 {
     62 	/* Nothing. */
     63 	return false;
     64 }
     65 
     66 /*
     67  * Flags to tell pmap_enter `this is not to be cached', etc.
     68  * Since physical addresses are always aligned, we can use
     69  * the low order bits for this.
     70  */
     71 #define	PMAP_OBMEM	0x00	/* unused */
     72 #define	PMAP_OBIO	0x00	/* unused */
     73 #define	PMAP_VME16	0x10	/* pmap will add the necessary offset */
     74 #define	PMAP_VME32	0x20	/* etc. */
     75 #define	PMAP_NC		0x40	/* tells pmap_enter to set PTE_CI */
     76 #define	PMAP_SPEC	0xFF	/* mask to get all above. */
     77 
     78 #endif	/* _KERNEL */
     79 
     80 /* MMU specific segment size */
     81 #define	SEGSHIFT	19	        /* LOG2(NBSG) */
     82 #define	NBSG		(1 << SEGSHIFT)	/* bytes/segment */
     83 #define	SEGOFSET	(NBSG - 1)	/* byte offset into segment */
     84 
     85 #define	sun3x_round_seg(x)	((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET)
     86 #define	sun3x_trunc_seg(x)	((vaddr_t)(x) & ~SEGOFSET)
     87 #define	sun3x_seg_offset(x)	((vaddr_t)(x) & SEGOFSET)
     88